Q.Can I use black cotton soil in making Hydraform blocks?
A. Never use Black cotton soil. Black cotton soil contains highly reactive clay and the blocks will crack when they dry. Also Black cotton soil contains too much organic material which will interfear with the hydration of the cement.
Q.What gives the Hydraform blocks their colour?
A. Typically the blocks will come out the same colour as the soil that was used to make them.
Q.How does the Hydraform HF140mm brick differ from the Hydraform HF220mm brick?
A. The HF220mm brick is mostly dry-stacked, this means that it does not need mortar between every course of brick work. The HF140mm brick is first dry-stacked and then a slurry made from fine sand and cement, is poured though the cavity on the bricks, this locks the structure together creating a strong firm wall.
Q.Can you please quote me, in US Dollars, the average selling prices of two-bedroom, three-bedroom and four-bedroom low cost house?
A. This is impossible as there are two many variables. Such as how many square meters is the house? What finishes are you using? What type of roof and foundations are you using? What are the local costs of materials, labour and transport?
Q.Can the machine also produce paving blocks?
A. Hydraform has a range of ‘Vibraform’ conventional vibration machines that can produce paving blocks. See the Vibraform page on this site.
Q.Can one burn or bake a Hydraform brick to strengthen it?
A. No. A Hydraform block is made to a close tolerances to ensure easy building. Firing or burning a Hydraform block will cause it to warp and loose its shape.
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